JPS60251491A - Print discriminator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a printed matter discriminating device such as a bill discriminating device for discriminating authenticity, fitness, etc. of banknotes.

[Technical background of the invention and its problems]

Conventionally, banknote discrimination devices used in cash sorting and counting machines or deposit/withdrawal machines detect the authenticity of banknotes by detecting the physical quantities of banknotes, such as magnetism, the color of printing ink, the amount of transmitted light, and the amount of reflected light. We are determining whether the product is fit or not. The discrimination level for this discrimination can be changed into a plurality of levels using a dial switch (for example, 10 levels, 16 levels). In this case, the difference in the determination level for each stage of the dial switch is equally spaced. For this reason, the number of unfit bills for each row suddenly increases or decreases when the value of the dial switch is changed, making the system extremely unusable from the operator's perspective.

[Purpose of the invention]

The present invention has been made in view of the above circumstances, and an object thereof is to provide a printed matter discrimination device in which the determination level can be easily changed.

[Summary of the invention]

In this invention, the determination level is changed to a plurality of stages, and the level interval for each stage is changed in accordance with the frequency distribution of the determination results.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, a banknote (printed material) 1 is conveyed on a conveyance path 2 in the direction of the arrow shown by a belt (not shown) or the like. Sensors 3 and 4 are provided on the conveyance path 2. The sensors 3 and 4 detect optical information by optically scanning the banknote 1. For example, sensor 3 is a sensor for detecting damage, and sensor 4 is a sensor for detecting damage. Becoming/being.

As shown in FIG. 2, the output of the sensor 3 is subjected to signal processing in a signal processing circuit 5 and then supplied to a discrimination circuit 6. Further, the output of the sensor 4 is subjected to signal processing by a signal processing circuit 7 and then supplied to a determination circuit 8 . This determination circuit 8 is a well-known circuit that determines whether or not there is damage to υ based on the signal supplied from the signal processing circuit 7), and this determination result is supplied to the determination circuit 6 via the damage detection switch 9. be done.

The determination circuit 6 compares the signal supplied from the signal processing circuit 5 with a preset determination level to determine authenticity, integrity, etc. At the beginning of use of this device, the discrimination circuit 6 collects data of detection signals from the sensor 3 for a large amount of banknotes 1 that are generally in circulation, such as clean banknotes and dirty banknotes, and the frequency distribution is shown in FIG. Accordingly, based on this frequency distribution, the determination level is determined by changing the level interval for each switch of the dial switch 10 in proportion to the number of unfit bills. In this case, the relationship between the number of unfit bills and each stage of the dial switch 10 is shown by the solid line in FIG. Further, when the discriminating circuit 6 takes the frequency distribution, if the damage detection switch 9 is turned on and a damage detection signal from the determination circuit 8 is supplied, the detection signal from the sensor 3 is not collected. ing. In this case, the relationship between the number of unfit bills and each stage of the dial switch 10 is as shown by the dotted line in FIG.

Next, the operation of the configuration as shown in FIG. 5 will be explained with reference to the flowchart shown in FIG.

For example, first of all, a large amount of banknotes 1, such as clean banknotes and dirty banknotes, which are generally in circulation, are conveyed on the conveyance path 2 (5T1) and detected by the sensors 3 and 4. Then,
The detection signal from the sensor 3 for the large amount of banknotes 1 is processed by the signal processing circuit 5 and then supplied to the discrimination circuit 6 (8T, ?). Further, the detection signal from the sensor 4 for the banknote \1 is processed by the signal processing circuit 7 and then supplied to the determination circuit 8. At this point, the determination circuit 8 determines whether the supplied signal is corrupted or not. Therefore, when the detection signal is supplied from the discrimination circuit 6 and the signal processing circuit DA, the damage detection switch 9 is on (ST3), and when the damage detection signal is supplied (STM), the detection from the signal processing circuit 5 is Do not collect signal data (ST5). In addition, when the determination circuit 6 receives a detection signal from the signal processing circuit DA, the damage detection switch 9 is on (ST, 9), and when the damage detection signal is not supplied (ST4), or the damage detection switch 9 is turned off (ST5), the detection signal from the signal processing circuit is collected as data (5T6).
, its frequency distribution (histogram) is taken (ST7). Then, when all of the banknotes 1 have been conveyed (ST8), the discrimination circuit 6 determines that the relationship between each stage of the dial switch 10 and the number of unfit banknotes changes linearly as shown by the solid line or dotted line in FIG. , a determination level is assigned for each stage (ST9).

In such a state, the banknote 1 conveyed by the conveyance path 2 is scanned by the sensor 3. The detection signal of this sensor 3 is processed by a signal processing circuit 5 and then supplied to a discrimination circuit 6. This discrimination circuit 6 is a signal processing circuit 5
The detection level from and the determination level specified by the dial switch 10 are compared, and if the detection level is higher than the determination level, it is determined to be a genuine bill, and if it is smaller than the determination level, it is determined to be an unfit bill.

As mentioned above, since the level for each step of the dial switch for changing the judgment level is assigned so that the number of unfit notes changes in proportion to the number of unfit notes, it is easy for the user to change the judgment level. Become something. Moreover, since the result of determining whether a damaged ticket is good or damaged is not included in the frequency distribution when the damage detection switch is turned on, the relationship between the dial switch and the number of damaged bills becomes accurate.

In addition, in the above embodiment, the dial switch and damage detection switch used may be provided in a place where they cannot be easily operated, such as in a maintenance tunnel.

〔Effect of the invention〕

As described in detail above, according to the present invention, it is possible to provide a printed matter discrimination device in which the determination level can be easily changed.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a diagram showing a schematic configuration, FIG. 2 is a diagram schematically showing the main parts of an electric circuit, and FIG. FIG. 4 is a diagram for explaining the relationship between each stage of the dial switch and the number of unfit bills, and FIG. 5 is a flowchart for explaining the operation. 1... Banknotes (printed matter), 2... Conveyance path, 3, 4...
・Sensor, 5, 7...Signal processing circuit, 6...Discrimination circuit, 8...Judgment circuit, 9...Damage detection switch, 1
0...Dial switch. Applicant's agent Patent attorney Noriyuki Chika (and 1 other person) 1st mouth Figure 3 Figure 4 Figure 5

Claims (2)

[Claims] (1) In a printed matter discriminating device that determines whether a printed matter is correct by comparing the detection level of a physical quantity in the printed matter with a judgment level, the judgment level is changed to multiple stages, and each stage is A printed matter discriminating device characterized in that it is provided with a determination level determining means in which the level interval is changed according to the frequency distribution of the determination result. (2) The printed matter discriminating device according to claim 1, wherein the device for changing the determination level in multiple stages is a dial switch.